Pairing devices in conference using ultrasonic beacon
作者： Peter L. Chu , Yibo Liu
DOI:
关键词: Loudspeaker 、 Wireless network 、 Engineering 、 Computer hardware 、 Videoconferencing 、 Echo (computing) 、 Converters 、 Microphone 、 Ultrasonic sensor
摘要: A videoconferencing system has a unit that use portable devices as peripherals for the system. The obtain near-end audio and send to via wireless connection. In turn, sends from loudest device along with video far-end. can control initially establish videoconference by connecting far-end then transferring operations unit. To deal acoustic coupling between unit's loudspeaker device's microphone, uses an echo canceller is compensated differences in clocks used A/D D/A converters of microphone.
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